It's an interesting scene. The tow truck drivers are a mixture of bikers, ex-cons, ex-cops, and (probably) some legitimate operators. Or so I've read. They are notorious for ambushing hapless motorists who have broken down on the highway, and towing their vehicle to a repair shop to be held for ransom.  I don't know that they're even licensed, or what they'd have to do to lose one. There are probably a lot of 'freelance' operators regardless. Given the insane volume of traffic on the highway, they are unlikely to be under any sort of meaningful oversight, and only attract the attention of the wrong police by chance.